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  2. Engel curve - Wikipedia

    en.wikipedia.org/wiki/Engel_curve

    For normal goods, the Engel curve has a positive gradient. That is, as income increases, the quantity demanded increases. That is, as income increases, the quantity demanded increases. Amongst normal goods, there are two possibilities.

  3. Envelope theorem - Wikipedia

    en.wikipedia.org/wiki/Envelope_theorem

    In mathematics and economics, the envelope theorem is a major result about the differentiability properties of the value function of a parameterized optimization problem. [1] As we change parameters of the objective, the envelope theorem shows that, in a certain sense, changes in the optimizer of the objective do not contribute to the change in ...

  4. Gradient - Wikipedia

    en.wikipedia.org/wiki/Gradient

    The gradient of F is then normal to the hypersurface. Similarly, an affine algebraic hypersurface may be defined by an equation F(x 1, ..., x n) = 0, where F is a polynomial. The gradient of F is zero at a singular point of the hypersurface (this is the definition of a singular point). At a non-singular point, it is a nonzero normal vector.

  5. Autoregressive model - Wikipedia

    en.wikipedia.org/wiki/Autoregressive_model

    For an AR(1) process with a positive , only the previous term in the process and the noise term contribute to the output. If φ {\displaystyle \varphi } is close to 0, then the process still looks like white noise, but as φ {\displaystyle \varphi } approaches 1, the output gets a larger contribution from the previous term relative to the noise.

  6. The gambling industry's sly new way to suck money from ...

    www.aol.com/gambling-industrys-sly-way-suck...

    The technology, they continued, could create "individually themed online slot games that can respond to a player's voice and even generate novel content in response to a player's behavior and game ...

  7. Positive and normative economics - Wikipedia

    en.wikipedia.org/wiki/Positive_and_normative...

    In the philosophy of economics, economics is often divided into positive (or descriptive) and normative (or prescriptive) economics.Positive economics focuses on the description, quantification and explanation of economic phenomena, [1] while normative economics discusses prescriptions for what actions individuals or societies should or should not take.

  8. US economy poised for 'solid' growth in 2025 because America ...

    www.aol.com/finance/us-economy-poised-solid...

    The US economy is on solid footing right now. Economists at Bank of America expect it to stay that way through next year. In a research note released to reporters on Monday, BofA's economics team ...

  9. Costco posts another quarter of sales growth against an ...

    www.aol.com/finance/costco-expected-post-another...

    Its e-commerce business grew 13.2% but missed estimates of 14.1%. Online sales were boosted by gold and jewelry, in addition to hardware, gift cards, home furniture, sporting goods, and health and ...